How do you sit down and study without getting distracted/bored

I find that I have to study a little bit at a time. I can't possibly study for hours, or too much in one day. After a while I'm just so bored that I read without taking in any information. I dedicate about half an hour for studying, then I take a break, and go back to it over an hour later. Then I do it again the next day. I think it sounds as though I'm not studying for long enough, but I do great on tests this way.

I study at crunch time! I dont like studing period but if I give myself 3 days before the deadline I surprise myself by remebering most of the things that assulted my brain with dates, numbers, and long monologes.